Analiza eliminacji elektromagnetycznych zaburzeń przewodzonych w kolejowych systemach bezpieczeństwa

W artykule przedstawiono opis stanowiska pomiarowego do badania emisji elektromagnetycznych zaburzeń przewodzonych na portach zasilających EUT. Zaprezentowano metodykę pomiarową, dopuszczalne wartości elektromagnetycznych zaburzeń przewodzonych wg normy PN-EN 50121-3-2 i PN-EN 50121-4. W artykule omówiono wyniki z przeprowadzonych pomiarów oraz zaproponowano metodę eliminacji zakłóceń na porcie wejściowym 24V DC centrali alarmowej.

The article presents the study of conducted disturbance emission, which was subjected to the alarm control panel on the (+, -) 24V DC power supply ports and the method of elimination of electromagnetic interferences. The measurements were carried out in an accredited testing laboratory on a measurement stand with a standardized configuration of equipment in accordance with the applicable standards in the field of electromagnetic compatibility. During the measurements, exceedances of the limit value at the power terminals were observed. Appropriate steps have been taken to reduce the interference levels by using an appropriate anti-interference filter inside the control panel. Installing the filter in accordance with the manufacturer's instructions allowed to obtain the expected results. The article presents the effects of research in the form of electromagnetic characteristics of conductive disturbances as a function of frequencies recorded on the measuring device.