+- IRSE Exam Forum (https://irse.signalpost.org)
+-- Forum: MODULES (https://irse.signalpost.org/forumdisplay.php?fid=3)
+--- Forum: Module 7 (https://irse.signalpost.org/forumdisplay.php?fid=10)
+---- Forum: Specific topics (https://irse.signalpost.org/forumdisplay.php?fid=85)
+---- Thread: Environmental Conditions, EN50125 (/showthread.php?tid=1116)
Environmental Conditions, EN50125 - PJW - 05-11-2012
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)