BS EN 50121-3-1:2017+A1:2019

What is BS EN 50121‑3‑1 - Electromagnetic compatibility of railway rolling stock about?  

BS EN 50121 is a series of the European standards on railway applications that discusses electromagnetic compatibility between train and complete vehicle. 

BS EN 50121‑3‑1 is the first sub-part of the third part of the BS EN 50121 series of documents that specifies the emission and immunity requirements for all types of rolling stock. 

NOTE: BS EN 50121‑3‑1 covers traction stock, hauled stock and trainsets including urban vehicles for use in city streets. 

Who is BS EN 50121‑3‑1 - Electromagnetic compatibility of railway rolling stock for? 

BS EN 50121‑3‑1 on railway applications is applicable to: 

• Manufacturers of railway rolling stock 
• Railway authority 
• Railway engineer 
• Mechanical engineer 

Why should you use BS EN 50121‑3‑1 - Electromagnetic compatibility of railway rolling stock? 

Electromagnetic compatibility has become a critical issue for the design of train-related apparatus as well as of the train as a whole. 

BS EN 50121‑3‑1 ensures the emission tests and limits for rolling stock that does not interfere with typical installations in the vicinity of the railway system.  

The tests method mentioned in BS EN 50121‑3‑1 helps you cover the operation of all systems onboard rolling stock which may produce radiated emissions. 

As signalling and communication, train radio, and other railway systems are different in every nation in terms of operation, BS EN 50121-3-1 provides compatibility tests that are specified according to the kind of signalling and communication systems employed. 

Moreover, BS EN 50121-3-1 guides you on the requirements for the apparatus installed in the rolling stock that sets limits for electromagnetic emission and immunity in order to ensure a well-functioning system within its intended environment providing reliability, availability, maintainability and safety of the railway. 

In this way, you can utilise the railway rolling stock that aims to improve the capacity of the whole railway, especially that of communication systems and the safety of the message transmissions between train and complete vehicle. 

What’s changed since the last update?  

BS EN 50121‑3‑1:2017+A1:2019 supersedes EN 50121-3-1:2015. BS EN 50121‑3‑1:2017+A1:2019 includes some technical changes with respect to EN 50121-3-1:2015. These include: 

• Clarification of scope 
• Set dated normative references  
• Clarification of applicability and clarification of interference on outside party telecommunication lines, psophometric current 
• Moving emission values for radiated H-field in the frequency range 9 kHz to 150 kHz  
• Editorial corrections in the European foreword, the Scope and Annex A.