Calex Manufacturing explains EN50155 standard covering electronics in rolling stock for railway app.

Описание: Calex manufacturing explains EN50155 an international standard covering electronic equipment used on rolling stock for railway applications.


Railway operators face harsh environmental variances and the fact that railway is a moving application contributes to the complexity.


EN50155 standard is vital to all railway applications, since it addresses the application requirements seen in all rolling stock equipment.


Most of the EN50155 standard revolves around the power supplies utilized within a rail-car.


Critical compliance requirements covered in EN50155 include:


·- Ambient Temperature: Operation from -40°C to +85°C for at least 10 minutes during start-up.
Power supplies must work at 85% or better efficiency over a wide range of voltage input and load varying operating conditions.
Temperature management is essential since there are many areas of the world that see varying temperature extremes throughout the day.
·- Shock & Vibration: This requirement refers to the tolerance for power supplies that are mounted to the body or an axle as an example.

The ability to resist vibration and be mechanically sound are critical for railway applications.


· Power Supply Input Voltage: EN50155 covers input voltages voltages of 24, 28, 36, 48, 72, 96 and 110V DC.


Power supplies utilized for railway applications must operate in tight regulation with minimal deviation from the nominal voltage.


Performance & Reliability : Quality and safety are two large factors addressed in EN50155 and cover fault protection, wiring, layout, connectors and components utilized for the power supply.


Approval Testing: EN50155 testing includes many factors including visual inspection, operating performance, low temperature operation, operation in dry heat, operation over the full input voltage range, surge resistance, ESD compliance, transient response, electrical isolation, shock and vibration.


Calex DC-DC railway converters are available from stock and comply to EN50155, perfect for new or retrofit applications.


For more information please visit us at www.calex.com