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O que (quem) é 25 kV AC railway electrification - definição
25 kV AC railway electrification
![The [[East Coast Main Line]] in the United Kingdom is electrified using 25 kV 50 Hz [[overhead lines]]](https://commons.wikimedia.org/wiki/Special:FilePath/East coast main line. - geograph.org.uk - 103409.jpg?width=200 "The [[East Coast Main Line]] in the United Kingdom is electrified using 25 kV 50 Hz [[overhead lines]]")
RAILWAY ELECTRIFICATION SYSTEM
25kVAC; 50 kV AC; 25kV AC; 25 kV AC; 25 kV/50 Hz AC; 25 kV 50 Hz AC; 25 kV 50 Hz; 25 kV 60 Hz AC; 25 kV AC, 60 Hz; 12.5 kV AC railway electrification; 25 KV AC railway electrification; 12.5 kV AC
Railway electrification systems using alternating current (AC) at are used worldwide, especially for high-speed rail.
15 kV AC railway electrification
RAILWAY ELECTRIFICATION SYSTEM IS USED IN GERMANY, AUSTRIA, SWITZERLAND, SWEDEN AND NORWAY
15kV AC; 15kVAC; 15 kV AC; 15 kV 16.7 Hz AC; 15 kV 16⅔ Hz; 15 kV 16 2/3 Hz; 15 kV 16.7 Hz; 15 kV 16.67 Hz
Railway electrification systems using at are used on transport railways in Germany, Austria, Switzerland, Sweden, and Norway. The high voltage enables high power transmission with the lower frequency reducing the losses of the traction motors that were available at the beginning of the 20th century.
Three-phase AC railway electrification
![pantograph]] on a [[Corcovado Rack Railway]] train in [[Brazil]]](https://commons.wikimedia.org/wiki/Special:FilePath/Corcovado Bergbahn 2005-03-15.jpg?width=200 "pantograph]] on a [[Corcovado Rack Railway]] train in [[Brazil]]")
![[[FS Class E.550]] (Italy 1906–65)](https://commons.wikimedia.org/wiki/Special:FilePath/E551-001pietrarsa1999-04-08.jpg?width=200 "[[FS Class E.550]] (Italy 1906–65)")
![[[FS Class E330]] (Italy 1914–63). Note the long bow collectors, with their pickup points at the far ends of the locomotive.](https://commons.wikimedia.org/wiki/Special:FilePath/Mus Scienza Tecnica loco E.330.JPG?width=200 "[[FS Class E330]] (Italy 1914–63). Note the long bow collectors, with their pickup points at the far ends of the locomotive.")
Three-phase AC railway electrification was used in Italy, Switzerland and the United States in the early twentieth century. Italy was the major user, from 1901 until 1976, although lines through two tunnels also used the system; the Simplon Tunnel between Switzerland and Italy from 1906 to 1930 (but not connected to the Italian system), and the Cascade Tunnel of the Great Northern Railway in the United States from 1909 to 1939.
