Abstract
Axle counters are more and more often applied in train detection systems. The wheel sensor is a main part of each axle counter system. In parallel, more and more complex railway vehicles, especially traction ones, are a potential source of interferences influencing the operation of these train detection systems. It is the reason to verify the electromagnetic compatibility (EMC) between the signalling equipment, particularly train detection systems and new vehicles in the process of obtaining the permission for their exploitation. The measurement of interfering magnetic fields generated by vehicles is one of tests to be carried out. For the simplification and unification purpose of the applied interference test methods the EN 50238 standard and TS 50238-3 technical specification were developed. The specification defines unified testing procedures. However, it is necessary to verify if it may replace different testing methods used in particular European states. It is the goal of the European research project financed from the TEN-T network resources.
Highlights
Axle counters are more and more often applied in train detection systems
Maximum levels of electromagnetic interference within the scope of national requirements are defined in the project of the Railway Research Institute No 4430/10 "Determination of maximum levels and interference parameters for railway signalling equipment", while in the European law these levels are included in the technical specification CLC/TS 502383:2013: “Railway applications
Issues generally related to the subject of compatibility regarding the interaction of rolling stock with train detection devices are defined in the following standards: PN-EN 50238 and PN-EN 50617-2: 2015-12 “Railway applications - Technical parameters of train detection systems concerning the interoperability of the trans-European rail system - Part 2: Axle counters”[7]
Summary
The widespread use of metering systems for track vacancy detection by various railway managements has highlighted problems of these devices’ resistance to interferences generated by rolling stock. Another related aspect is equipping rail vehicles with electric and electronic equipment with extensive structure. The standardization activities on the European level have been ongoing for many years in order to unify and simplify procedures related to particular rolling stock types’ placing in service on the European railway network These efforts are largely focused on the so called process of frequencies management resulting in the determination of maximum levels of interference for particular frequency bands. Issues generally related to the subject of compatibility regarding the interaction of rolling stock with train detection devices are defined in the following standards: PN-EN 50238 and PN-EN 50617-2: 2015-12 “Railway applications - Technical parameters of train detection systems concerning the interoperability of the trans-European rail system - Part 2: Axle counters”[7]
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