PROTECTION OF INSTALLATIONS AND ELECTRIC MOTIVE POWER UNITS AGAINST THE EFFECTS OF OVERVOLTAGES. TESTS CONCERNING THE PROPAGATION OF IMPULSE VOLTAGES ON 1500 AND 3000 VOLT OVERHEAD CONTACT SYSTEMS
The propagation of overvoltage waves along transmission lines depends on a certain number of parameters the extent of whose influence, in the case of railway overhead contact systems at least, has not hitherto been investigated and checked by means of practical tests. This report contains a description and the results of such tests. The SNCF has carried out a series of low-voltage tests with a peak impulse value of about 500 V, and a series of high-voltage tests with a peak value of 40 kV. The FS have conducted a series of high-voltage tests with a peak value of 75 kV. These tests showed that the propagation phenomena along overhead lines, e.g. speed of propagation, reflection at the end of open-ended lines and of points where there are pronounced discontinuities, such as at metal bridges, conform with the calculated values, due allowance being made of course for the inevitable differences between the phenomena occurring when the impulse wave is travelling along the line and the unavoidable approximations which have to be made to deal with such phenomena mathematically.
- Restrictions on the use of this document are contained in the explanatory material.
International Union of RailwaysOffice of Research and Experiments
- Publication Date: 1968-10
- Features: Appendices; Figures;
- Pagination: 27 p.
- TRT Terms: Overvoltage; Railroad electrification
- Identifier Terms: Ferrovie dello Stato; Societe nationale des chemins de fer francais
- Old TRIS Terms: Question a50
- Subject Areas: Construction; Railroads;
- Accession Number: 00052694
- Record Type: Publication
- Source Agency: International Union of Railways
- Report/Paper Numbers: A50/RP 10/E
- Files: TRIS
- Created Date: May 14 1976 12:00AM