BEHAVIOR OF PANTOGRAPHS AND THE OVERHEAD EQUIPMENT AT SPEEDS HIGHER THAN 160 KM/H. HIGH-SPEED TESTS CONDUCTED BY THE SNCF ON 1.5 KV DC SYSTEMS

This report describes the tests carried out by the SNCF on the Vierzon - Les Aubrais and Paris - Bordeaux 150C-V electrified lines the layout of which are given in Appendices 1 and 2 respectively. The chief object of the tests was to study the dynamic behaviour of the overhead system, particularly resonance, under the effect of high-speed traffic, and to devise ways of minimizing adverse effects. Two types of pantograph were used. The overhead system on the test section was of the usual compound type, but certain modifications had been made to it for experimental purposes (pre-sag of the contact wires, special spacing of the droppers, special droppers). It was found that by damping the pantograph the resonance oscillations were considerably reduced, and that a marked improvement was obtained by means of the pre-sag of the contact wires. On the other hand, the modifying of the dropper-spacing - although improving the elasticity of the overhead system - did not have any marked effect on current-collection quality. Various modifications of the overhead system have been recommended with a view to commercial speeds of 200 km/hr.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1967-11

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 32 p.

Subject/Index Terms

• TRT Terms: Contact wire; Damping (Physics); Electrical conductivity; Pantographs; Railroad electrification
• Identifier Terms: Societe nationale des chemins de fer francais
• Old TRIS Terms: Conductor collector dynamics; High speed tests; Question a84
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00052712
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: A84/RP 4/E
• Files: TRIS
• Created Date: May 14 1976 12:00AM