ECN Forum Forums General Topics of the Trade General Discussion Area Non-60Hz power in North America

I worked on a railroad in Duluth MN and we had 25 cycle power into mid 1980's. Both 25 and 60 cycle were supplied by the utility. I was on the crew that had to eliminate the need for 25 cycle as the utility was discontinuing it. I don't know how they generated it on their end but we had two 13.8kv loops on our property.