IMMUNISING DELHI MAIN INTERLOCKING READY FOR 25 KV 50 HZ ELECTRIFICATION

Electrification of the Delhi-Calcutta route of Indian Railways required progressive conversion of the Delhi controls so that signal equipment would be unaffected by the high-voltage ac traction power. The modifications, the first three of which are to limit induced voltages in signalling circuits to about 120 V, consisted of replacement of unscreened cables; modification of switch and various other circuits; modification of power supply; and replacement of 50 Hz double-rail track circuits by high-voltage impulse or dc track circuits.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03735346
• Corporate Authors:

  IPC Transport Press, Limited

  Dorset House, Stamford Street
  London SE1 9LU,   England 
• Authors:
  • Gupta, K
• Publication Date: 1977-3

Media Info

• Features: Figures; Photos;
• Pagination: p. 112-114
• Serial:
  • Railway Gazette International
  • Volume: 133
  • Issue Number: 3
  • Publisher: DVV Media Group
  • ISSN: 0373-5346
  • Serial URL: http://www.railwaygazette.com/about-us.html

Subject/Index Terms

• TRT Terms: Electric power supply; Inductive interference; Railroad electrification; Signaling; Track circuits
• Old TRIS Terms: Interference control
• Subject Areas: Energy; Railroads;

Filing Info

• Accession Number: 00156257
• Record Type: Publication
• Source Agency: Railway Gazette International
• Files: TRIS
• Created Date: Jul 19 1977 12:00AM