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Railway electrification systems using alternating current (AC) at 15 kilovolts (kV) and 16.7 hertz (Hz) 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. Railway electrification in late 20th century tends to use 25 kV, 50 Hz AC systems which has become the preferred standard for new railway electrifications but extensions of the existing 15 kV networks are not completely unlikely. In particular, the Gotthard Base Tunnel (opened on 1 June 2016) still uses 15 kV, 16.7 Hz electrification.

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  • Railway electrification systems using alternating current (AC) at 15 kilovolts (kV) and 16.7 hertz (Hz) 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. Railway electrification in late 20th century tends to use 25 kV, 50 Hz AC systems which has become the preferred standard for new railway electrifications but extensions of the existing 15 kV networks are not completely unlikely. In particular, the Gotthard Base Tunnel (opened on 1 June 2016) still uses 15 kV, 16.7 Hz electrification. Due to high conversion costs, it is unlikely that existing 15 kV, 16.7 Hz systems will be converted to 25 kV, 50 Hz despite the fact that this would reduce the weight of the on-board step-down transformers to one third that of the present devices. (en)
  • El sistema electrificación ferroviaria de 15 kV 16,7 Hz de CA se utiliza en Alemania, Austria, Suiza, Suecia y Noruega. La alta tensión permitía transmitir alta potencia con frecuencia más baja, lo que reduce las pérdidas de los motores de tracción que estaban disponibles a principios del siglo XX. La electrificación ferroviaria a finales del siglo XX tiende a utilizar sistemas de CA de 25 kV, y 50 Hz que se ha convertido en la normativa preferida para nuevas electrificaciones ferroviarias, pero no es completamente improbable que se construyan prolongaciones de las redes existentes a 15 kV. En particular, el túnel de base de San Gotardo (abierto el 1 de junio de 2016) todavía utiliza la electrificación de 15 kV, 16,7 Hz, a pesar de que conecta con el sistema italiano en el extremo sur, que usa 25 kV, 50 Hz. Esto obliga a que las locomotoras estén preparadas para admitir electrificación bitensión. Debido a los altos costos de conversión, no es probable que los sistemas existentes de 15 kV, 16,7 Hz se conviertan a 25 kV, 50 Hz a pesar del hecho que esto reduciría el peso de los transformadores de a bordo a un tercio de los dispositivos actuales. (es)
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  • Railway electrification systems using alternating current (AC) at 15 kilovolts (kV) and 16.7 hertz (Hz) 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. Railway electrification in late 20th century tends to use 25 kV, 50 Hz AC systems which has become the preferred standard for new railway electrifications but extensions of the existing 15 kV networks are not completely unlikely. In particular, the Gotthard Base Tunnel (opened on 1 June 2016) still uses 15 kV, 16.7 Hz electrification. (en)
  • El sistema electrificación ferroviaria de 15 kV 16,7 Hz de CA se utiliza en Alemania, Austria, Suiza, Suecia y Noruega. La alta tensión permitía transmitir alta potencia con frecuencia más baja, lo que reduce las pérdidas de los motores de tracción que estaban disponibles a principios del siglo XX. Debido a los altos costos de conversión, no es probable que los sistemas existentes de 15 kV, 16,7 Hz se conviertan a 25 kV, 50 Hz a pesar del hecho que esto reduciría el peso de los transformadores de a bordo a un tercio de los dispositivos actuales. (es)
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  • 15 kV AC railway electrification (en)
  • Electrificación ferroviaria de 15 kV de CA (es)
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