Technical supervision of tram turnout heating on the example of Warsaw

A block diagram of the tram turnout heating system in Warsaw is presented and discussed. The system can perform the following functions: control and measurement of heater current, outdoor temperature measurement, activation of local controllers, measurement of rain or snow precipitation, and transmission of this data to a monitoring center. Example thermograms of turnout surfaces, taken during frosty weather using a thermal imaging camera, are shown. The advisability of using heaters with different power ratings was analyzed. Finally, a work schedule for replacing a burnt-out heater is provided.Technical supervision of tram rail-switches heating: Warsaw case study
Abstract
A block diagram of system used in Warsaw for tram rail-switches heating is presented and discussed. The system can perform the following functions: heaters current control and measurement, outdoor temperature measurement, triggering of local controllers, rain and snow precipitation measurement and the data transmission to the monitoring centre. Some examples of switches surface thermograms taken with thermovision camera in frosty weather are given. The appropriateness of use of heaters with different power was discussed. Finally a work schedule for replacing burned heater is given. (…)

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