INFLUENCES OF CIRCULATING SIGNAL CURRENT ON SIGNALLING DEVICES

Influences on signalling devices of circulating signal current which flows through negative feeder and track circuits in adjacent line in the case of broken rail or broken arm of impedance bond were measured in the territory of 60 c/s AC electrified double track on the Hokuriku Line. The circulating signal current was maximum when return rails were connected with each other and two negative feeders were connected with each rail. If two accidents occur in track circuits with the same signal frequency, the dangerous condition, that the track relay of AF track circuit can not drop away on account of the circulating current when a train occupies the track circuit, may possibly result. Countermeasures, such as different frequencies, adequate output of signals power, etc., must be taken to prevent the dangerous condition.

• Availability:
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• Corporate Authors:

  JAPANESE NATIONAL RAILWAYS

  TOKYO,   Japan 
• Authors:
  • Kawanabe, H
  • Nakayama, M
• Publication Date: 1960-12

Media Info

• Features: References;
• Pagination: p. 71
• Serial:
  • Railway Technical Research Institute, Quarterly Reports
  • Volume: 1
  • Issue Number: 4
  • Publisher: Railway Technical Research Institute/Tetsudo Gijutsu Kenkyujo
  • ISSN: 0033-9008
  • Serial URL: http://www.rtri.or.jp/eng/

Subject/Index Terms

• TRT Terms: Signal devices; Technology
• Geographic Terms: Japan
• Old TRIS Terms: Circulating signal current
• Subject Areas: Railroads;

Filing Info

• Accession Number: 00033097
• Record Type: Publication
• Report/Paper Numbers: Quart Rpt
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM