CHOSEN QUESTIONS IN MODELLING OF LIGHTENING RISK OF CATENARY FOR THE GROUP CONNECTION TO THE RAIL IN THE OPEN LAY-OUT

Abstract

In the paper I spoke components of the model describing the accepted to the analysis system of the traction wires net with the group connection to the rail in an open system at an extortion current 8/20 µs and voltage's 1.2/50 µs. To the analysis, one section of the group connection to the rail containing 54 fragments was taken into account. For this purpose models of particular elements in the lay-out were worked out: contact line, rail return, tower, insulator, surge. I represented possibilities of the simulation at the utilization of the programme LTspice and I based the necessity of the treat of the problem of the lightning protection efficiency of railways devices. Analysed possibilities of the programme have the cognitive character and will be put-upon to further analysis and estimations of the threat of feeding parley of the rts devices caused by surges of the atmospherical origin. The results of the presented analysis that a credible simulation of the overvoltage protection can be used to choose adequate models of elements and a correct parameters estimation of the measurement and analysis.