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J.del Portillo, I.Adin, J.Mendizabal, D.Valderas, I.Ortego, G.Solas.Enhancing the rolling stock standards towards a harmonized electromagnetic environment.TRA2014 Transport Research Arena 2014.Transport Solutions: from Research to Deployment - Innovate Mobility, Mobilise Innovation. 14-17 Apr 2014 Paris La Défense (France).



Currently rolling stock electromagnetic emissions are a major concern for train manufacturers and railway infrastructure operators. Available harmonized EMC standards do not completely address interoperability issues caused by rolling stock interferences with electronic equipment such as signalling systems, train detectors or communication systems. These issues affect the relevant actors of the railways. On one hand, the waste of time for train manufacturers when integrating rolling stocks and electronic equipment; on the other hand, railway infrastructure availability reduction caused by the rolling stock electromagnetic incompatibility with the safety critical signalling systems suffered by railway infrastructure operators.

Based on the analysis of standards and existing incompatibilities between rolling stock, it has been demonstrated that the EMC standards, such as EN50121 (EN50121-2, EN50121-3-1 or EN50121-3-2), EN50122, EN50215, EN50238, EN50388 do not cover the whole complex railway environment leading to some systems malfunctioning. Therefore, railway electromagnetic noise and electromagnetic interaction among railway constituents has to be characterised, standardised and harmonized in order to decrease time to market and certification costs and increase availability of the railway system.  

In this context, this paper will show the current results of three projects funded by the seventh framework programme: TREND (Test of Rolling Stock Electromagnetic Compatibility for cross-Domain Interoperability), ECUC (Eddy Current Brake Compatibility) and EATS (ETCS Advanced Testing and Smart Train Positioning System). TREND aims at harmonizing rolling stock approval test, ECUC aims at harmonizing the interaction between Eddy-current brakes (ECB) and signalling systems and EATS aims at ETCS enhanced laboratory testing.

TREND has the objective of identifying the rolling stock emissions, modelling the communications systems concerned and designing a test setup that enables the harmonization of rolling stock approval tests for EMC. This project studies the broadcast services, track circuits, GSM-R and BTM.

ECUC is based on the analysis of the incompatibilities between ECB, a constituent of the rolling stock, and trackside signalling systems. The use of linear ECB in rolling stock shortens the stopping distance and reduces the dependency of the actual braking capability on the wheel/rail adhesion properties increasing rail safety. To date, ECB in rolling stock gives rise to incompatibilities with some signalling systems. ECUC will overcome this situation by means of the understanding of the interaction between ECB and trackside signalling equipment.

Finally, EATS project studies the ETCS current laboratory testing strategy. Electromagnetic environment is not included when testing the system and therefore, air-gap problems are not translated to the test cases employed nowadays. Moreover, ETCS standards do not include this issue and the BTM definition can be taken as an example. Even if air-gap disturbances have been identified to affect to the 9 Hazards of the subsystem, the standard states that the designer has to define its own noise models and it does not consider including any air-gap noise effect to validate the subsystem.







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Project acronym:

Project name:
Test of Rolling Stock Electromagnetic Compatibility for cross-Domain interoperability

Project reference:

Start date: 01/11/2011
End date: 30/04/2014

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