Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Why the 2×25 kV alternative? [autotransformer traction supply]

Sign In

Full text access may be available.

To access full text, please use your member or institutional sign in.

The purchase and pricing options are temporarily unavailable. Please try again later.
1 Author(s)

The author describes how it was the electrotechnical aspect in the form of reduction of losses on lines which was attractive in 2×25 kV traction power feeds in France; the first application was in 1981 on the new Paris-Lyon high speed railway line; this made it possible to avoid costly construction of high voltage lines to connect substations to the national grid distribution network. It soon emerged that as a result of the very rapid development of the public telephone network in France, the system was very useful to diminish interference on subscriber lines. The cost of the corresponding protection borne by the SNCF because of regulations in force accounted for an extremely high proportion of total electrification costs with the 1×25 kV system. At the end of 1992, in France, 12869 km of the track subgrade had been electrified. 6970 km were electrified to 25 kV with 107 substations, 1570 km of which were 2×25 kV with 25 substations and 5400 km of which were 1×25 kV with 82 substations

Published in:

50kV Autotransformer Traction Supply Systems - the French Experience, IEE Colloquium on

Date of Conference:

9 Nov 1993