Causes of EMC disturbance on the railway : A study of recurring faults in the signal box at Oxmyran Station in Sweden

摘要

Failure reporting systems in the railway industry are reliant on correct reporting into the system, so that the right information may be sent back to the user. This information is needed for correct decision-making in the maintenance process. For failure due to electromagnetic disturbance a correct classification can be very difficult to make in the field, with limited time available for the analysis of failure causes. Banverket (the Swedish Railway Administration) has a problem in a signal box at Oxmyran Station, where faults are reported frequently. The wide variation in the reported causes of the disturbance of the electromagnetic compatibility makes it very difficult to pinpoint the real causes of the events that lead to failure. In this paper a large number of causes are investigated, discussed and dismissed as reasons for the large number of faults at Oxmyran. Measurements on site, however, show that the electromagnetic interference is much higher at Oxmyran than at the reference station at OEre AElv. The main purpose of this study was to investigate the probable source and the subsequent sequence of events that result in faults that break the RC circuit at Oxmyran, This be completed and requires continued meticulous investigation of the system.