The Railway Standards

Essentially, EN 50155 outlines:

• Operating conditions (regarding environment, electrics, EMC)

• Technical construction features (components, construction, development, etc.)

• Reliability, maintenance, service life

• Documentation and testing

EN 50155 refers to a wide range of testing processes and standards (e.g., EN 61373 – Vibration and Shock or EN 50121-3-2 – EMC) and classifies their results.

Depending on the component, different requirements and guidelines must be taken into account. The minimum factors to be considered are:

• Temperature

• Vibration and impact

• Relative humidity

For electrical components (relays, optocouplers, signal conditioning modules, fieldbus systems, etc.), the electrical operating conditions must be considered before all else. These include:

• Power supply fluctuations and interruptions

• EMC (Immunity to interference and emission of interference)

• Selection of the subassemblies and development criteria

Trains are the safest mode of transportation. This is ensured not only by the operator, but also by the vehicle and component manufacturers. Whatever the reason for a fire – the passengers must be protected as much as possible.