RTRI REPORT June 2004
PAPERS

Effect of Contact Wire Temperature on Displacement of Automatic Tensioning Equipment

Atsushi SUGAHARA,  Chikara YAMASHITA,
Shin-ichi KATAYAMA,  Yasukazu FUJII


  This paper describes the effect of contact wire temperature on the displacement of automatic tensioning equipment. The allowable temperature for contact wires is now specified as 90 ºC by the standard on the installation of electrical structures, which was established by the Japanese National Railways. Enhancement of this allowable temperature will result in a number of merits, such as increases in train power loads and decreases in the number of feeding branches. For this purpose, we measured train load currents, contact wire temperature and displacement of automatic tensioning equipment at a commercial line. On the basis of measurement results, we have deduced a partial differential equation of heat conduction on contact wires, and numerically solved the equation for arbitrary run curves and headways by using the finite-difference method, and clarified the relation between the distribution of contact wire temperature and the displacement of automatic tensioning equipment.


* Full papers of RTRI Report are written in Japanese.

Copyright (c) 2004 Railway Technical Research Institute