On railways 25kV 50Hz network frequency AC is normally found on high-speed lines as you need the high voltage to get sufficient power transmission to the trains.
A TGV set typically consumers about 8 to 10 megawatts, depending on the configuration. There were high speed test sets consuming 19 MW!!
In Ireland 1.5kV DC is used in Dublin's DART which was only electrified in 1983/84 and the Luas tram system which is a relatively modern Alstom Citadis based system uses 750V DC
The UK uses:
National Rail: 25kV 50Hz Overhead and 650 V - 750 V DC 3rd Rail.
1.5kV DC overhead Tyne & Wear Metro
750V DC overhead - Trams
750 DC 3rd rail bottom contact - Docklands Light Rail DLR
630V DC 4th rail - London Underground (top contact)
Last edited by djk; 11/21/18 10:04 PM.
