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.

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  • Corporate Authors:

    IPC Transport Press, Limited

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

Media Info

Subject/Index Terms

Filing Info

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