Hi Peter,
-
You pretty much hit the nail on the head about the
25Hz AC found in the Eastern US. It was a convenient
motor / generator, unit pole - speed number that
worked out well.
-
Very early power generation in the US still dealt with
political issues and egos. Not many saw the benefits
of AC at higher frequencies until much later.
-
Niagra Mohawk started their Niagra Falls located
generation at 25Hz, later revamped up to 60Hz. Lamp
flicker was a major motivation for the increase in
frequency.
-
cheers
skipp
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