EN 50121 Test Standards for Railway Electromagnetic Compatibility

Electromagnetic and Electrical Tests

EN 50121 Test Standards for Railway Electromagnetic Compatibility

Electromagnetic compatibility (EMC) between electrical and electronic systems is a fundamental requirement for reliable and safe train operation. For example, it is clear that interference from traction equipment can affect the signaling system with potentially serious consequences. Therefore, the rail industry seeks to reduce the risk of such events occurring through identification processes and risk mitigation. Electromagnetic compatibility is an important part of these processes.

EN 50121 Test Standards for Railway Electromagnetic Compatibility

The main scope of EN 50121 standards is that they aim to ensure electromagnetic compatibility in the railway environment and also to ensure electromagnetic compatibility between the railway and other electrical and electronic equipment outside the railway environment.

The EN 50121 series of standards is divided into 6 sections covering different aspects of the railway environment. The structure of the standards and the way they are subdivided have not changed since the original publication. The EN 50121 standard consists of the following parts:

EN 50121-1 - General Requirements:

This part of EN 50121 summarizes the structure and content of the entire set. Specifies performance criteria applicable to the entire series of standards. Clause 5 provides information on EMC management. This part alone is not sufficient to assume conformity with the essential requirements of the EMC Directive and is intended to be used in conjunction with other parts of this standard.

EN 50121-2 - Emission of the Entire Railway System to the Outside World:

This part of EN 50121 aims to describe the electromagnetic environment of the entire railway system, including urban public transport and light rail. It defines the measurement method to verify emissions and gives cartography values ​​of the most common areas. This European Standard specifies the emission limits of the entire railway system to the outside world.

EN 50121-3-1 - Railway vehicles - Train and Complete Vehicle:

This part of EN 50121 covers emission and immunity requirements for all types of wagons. It covers traction stock and trainsets, including urban vehicles, for use on city streets.

EN 50121-3-2 - Railway vehicles - Device:

This part of EN 50121 applies to the emission and immunity aspects of EMC for electrical and electronic equipment intended for use in railway wagons. EN 50121-3-2 applies to the integration of apparatus into rolling stock. The considered frequency range is DC to 400 GHz.

EN 50121-4 Emission and Immunity of Signaling and Telecommunications Equipment:

This part of EN 50121 applies to signaling and telecommunication devices installed in the railway environment. Signaling and telecommunication apparatuses installed in vehicles are within the scope of EN 50121-3-2, signaling and telecommunication apparatuses installed in the substation and connected to the substation equipment are within the scope of EN 50121-5.

EN 50121-5 Emission and Immunity of Fixed Power Supply Installations and Devices:

This part of EN 50121 covers the emission and immunity characteristics of EMC for electrical and electronic equipment and systems intended for use in railway fixed installations associated with power supply.

EUROLAB Laboratory, with its professional testing experts and 25 years of accredited experience, provides you, our manufacturers and suppliers, the best testing service within the scope of EN 50121 and all its parts.

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