Environmental Conditions, EN50125

[PJW]

EN50125-3 considers three situations:
T1 (warm temperate, warm dry)
T2 (Cold temperate) and
TX (Cold)

Gives information about the environment in which equipment should be able to perform-

· Pressure (altitude, pulse pressure due to tunnel etc)

· Temperature (extremes, rate of change)

· Humidity (ambient, in cubicle, in shelter, in building, sudden rate of change)

· Wind (natural, passing trains)

· Rain (also considered combined with wind)

· Snow and Hail (all types of snow, driven snow by wind / vehicles passing and on board)

· Ice

· Solar radiation

· Lightning

· Pollution (chemical, biologically active, mechanically abrasive, electrically conductive)

· Fire protection

· Vibration (energy level, distribution across frequency range)

· Shocks (for mounting: on rail, on sleeper, in ballast, trackside)

· Electromagnetic Compatibility (victim, source)

· Power Supply (spec, tolerance of voltage and frequency)