Rotary Converter, IRT Subway Substation 13, NYC, 2017.
Rotary Converter, IRT Subway Substation 13, NYC, 2017.
Rotary Converter, IRT Subway Substation 13, NYC, 2017.
All the pixels, but no gap between the train and the platform, at https://www.flickr.com/photos/mattblaze/32992380451
#photography
NYC's IRT subway, opened in 1904, is powered by a 600 volt DC third rail running alongside the tracks. Power is fed to the system via a number of substations throughout the city, where high voltage AC is converted to the lower voltage DC used by trains.
Until recently, this was done with electromechanical rotary converters (essentially a combination AC motor and DC generator). They are now supplanted by solid state rectifiers, but a few of the original rotary converters remain operational.
Neat