INDUCTIVE INTERFERENCE OF THE SIGNAL AND PROTECTION SYSTEM OF THE NETHERLANDS RAILWAYS BY HIGH VOLTAGE OVERHEAD LINES RUNNING PARALLEL WITH THE RAILWAYS

This report deals with the inductive interference of the signal and protection system of sections of the Netherlands Railways by high voltage overhead lines running parallel with the railways. The signal and protection system of many railway sections in the Netherlands has a 50 Hz ac supply. The 50 Hz currents in the high voltage line running parallel with the railway induce 50 Hz currents in the rails. These parasitic currents can endanger the operation of the signal and protection system of the railway if both the level of the parasitic currents is too high and there is a rail fracture. Based on measurements and calculations it is shown that the amplitude of the parasitic currents in the rails depend upon many factors such as: the distance between the railway and transmission line, the presence of ground wires, the sequence of the phases on the tower when two circuits of the high voltage line have a symmetrical power load and the amplitude of the currents in the high voltage line. Some methods are given which can either decrease the parasitic currents in the rails or eliminate the dangerous influence of these currents on the signal and protection system of the railways.

• Supplemental Notes:
  • This paper was presented at the 25th Session held in Paris, France, August 21-29, 1974.
• Corporate Authors:

  International Conf on Large High Tension Elec Sys

  112 Boulevard Haussmann
  75008 Paris,   France 
• Authors:
  • Manders, AHE
  • Hofkens, G A
  • Schoenmakers, H
• Publication Date: 1974

Media Info

• Pagination: 14 p.

Subject/Index Terms

• TRT Terms: Electric power transmission; Interference; Railroad electrification; Safety; Traffic signal control systems; Transmission lines
• Identifier Terms: Nederlandse Spoorwegen
• Uncontrolled Terms: Inductive coupling
• Old TRIS Terms: Signal systems
• Subject Areas: Energy; Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00083949
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: 36-02 Paper
• Files: TRIS
• Created Date: May 1 1975 12:00AM