CONTINGENCIES IN THE DESIGN OF THE AUDIO TRACK-CIRCUIT

Problems exist with little used track due to dirty surface conditions leading to development of unbalanced track-circuits raising inter rail-relay drop out voltage. Factors include track-circuit lengths, adjustments to obtain constant lengths of pre-shunt and extended-shunt distance, effect of ballast resistance and its measurement. Little data is published on shunting characteristics, ionization voltage and relevance of the AAR standard minimum shunt in relation to audio-frequency.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/9675046
• Corporate Authors:

  Broadfields (Technical Publishers) Limited

  Little Leighs
  Chelmsford, Essex CMB 1PM,   England 
• Authors:
  • Frielinghaus, K H
• Publication Date: 1974-5

Media Info

• Features: Figures;
• Pagination: p. 182-188
• Serial:
  • Rail Engineering International
  • Volume: 4
  • Issue Number: 4
  • Publisher: De Rooi Publications
  • ISSN: 0141-4615

Subject/Index Terms

• TRT Terms: Signaling; Track circuits
• Old TRIS Terms: Audio frequency track circuits
• Subject Areas: Operations and Traffic Management; Railroads;

Filing Info

• Accession Number: 00057173
• Record Type: Publication
• Source Agency: Rail Engineering International
• Files: TRIS
• Created Date: Jul 31 1976 12:00AM