INTERFERENCES IN TELEPHONE CIRCUITS DUE TO THYRISTOR CONTROLLED D.C. TRACTION

For efficient control of motors in the case of d.c. traction, a thyristor chopper is used. Prior to introduction of thyristor chopper control in the metropolitan railway system extensive measurements were made in three cities of Fed. Rep. of Germany. After a brief review of chopper control this paper deals with the inductive interference on telephone cables. In general it can be established that the interference in telephone cables is mainly due to the current harmonics from the rectifier station. Furthermore, as far as the induced voltage is concerned it makes practically no difference which type of control is being used, as long as the d.c. traction power is the same.

Media Info

  • Features: References;
  • Pagination: p. 149-154

Subject/Index Terms

Filing Info

  • Accession Number: 00182797
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: n 77CH1224-5EMC Proceeding
  • Files: TRIS
  • Created Date: Oct 31 1981 12:00AM