Author(s)

R.J. Hill & M.L. Berova

Abstract

An important advantage of audio-frequency track circuits is the elimination of the least reliable track circuit component, the Insulating Block Joint (IBJ), whose function has been surpassed by electrically tuned terminations known as Electrical Separating Joints (ESJs). This paper is concerned with the analysis of the implications of ESJs design on overall track circuit design and performance and proposes a methodology for investigation of the performance of ESJs. Introduction During the last two or three decades, the audio-frequency jointless track circuit has come into widespread use, establishing itself as the preferred train detection (TD) technology in numerous modern signalling systems. Its developme

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