David Lesher writes:

(Michael Moroney) writes:


I also asked about tap changers/regulators. Is this what these are, and
if so, are they likely to be manual or automatic?

http://tinyurl.com/534ffq (Google Maps street view of a set of 3 on a pole
in upstate NY. You may have to click on street view and rotate to see them)


Yes. Note the primaries are broken by insulators, and there is no
secondary [240/120] service on the pole. [The lowest run is TV coax, then
neutral above it.]

I've never heard of such as manual regulators so I assume they are
automatic.

Earlier in this thread it was mentioned the automatic ones are expensive
and only used for big substations, not for long runs of distribution
systems like that one. Before I read that I assumed they must be
automatic.

It's somewhat unusual to see all three on one pole; it must be a BIG
one. Generally I see them staggered on 3 adjacent poles; or two poles
hold a platform between them.

At that location there used to be 2 adjacent poles with 3 transformers
on a platform between them, when the downstream was an older delta-
connected system. I bet they just reused one of the heavy duty poles.
I wonder why they simply didn't reuse the platform setup.

I wonder what each of those puppies weigh, and how many MVA they can
handle.