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History
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Amtrak Avelia Liberty trainset operating under the 25 Hz traction power system near Claymont, Delaware
Amtrak Avelia Liberty trainset operating under the 25 Hz traction power system near Claymont, Delaware
Old substation built for the 1915 electrification project at Bryn Mawr, Pennsylvania. Outdoor yard is an addition.
Old substation built for the 1915 electrification project at Bryn Mawr, Pennsylvania. Outdoor yard is an addition.
The Safe Harbor Dam generates 25 Hz railroad power via two turbines in the east end of the turbine hall and an M-G set outside against the Dam face.
The Safe Harbor Dam generates 25 Hz railroad power via two turbines in the east end of the turbine hall and an M-G set outside against the Dam face.
The Pepco Benning Road power station in Washington, D.C., supplied 25 MVA of 25 Hz power via a rotary frequency changer in the hall nearest the Metro
The Pepco Benning Road power station in Washington, D.C., supplied 25 MVA of 25 Hz power via a rotary frequency changer in the hall nearest the Metro tracks from 1935 until 1986.
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Transposition pylon of power line for single-phase AC traction current (110 kV, 16.7 Hz) near Bartholomä in Germany.
Transposition pylon of power line for single-phase AC traction current (110 kV, 16.7 Hz) near Bartholomä in Germany.
Pylons in a converter plant
Pylons in a converter plant