Technical Reports

Recommended Practices for Rail Transit Intra-System Electromagnetic Compatibility of Vehicular Electrical Power and Track Circuit Signaling Subsystems : Volume I: Inductive Recommended Practices

  • 01
  • May
  • 1982
SUBJECT: Evaluation
KEYWORDS: Electromagnetic Interference, Audio-Frequency Signaling System, Track Circuit
ABSTRACT: Methods for detecting and quantifying the levels of inductive electromagnetic interference produced by solid state rapid transit propulsion equipment and the susceptibility of audio-frequency signaling systems to these emissions are presented. These methods include procedures for taking measurements in the field, in the laboratory and on track circuits. As background, the mechanisms of inductive and conductive electromagnetic interference are described, as are audio-frequency track circuits and de chopper control. Recording and documentation procedures for applying these recommended practices are provided. Appendix A contains definitions of terms and systems of units. Appendix B contains sample outputs of tests using inductive recommended practices.