Author(s)

I. Străinescu, V. Rădulescu, E. Tudor & C. Unguraşu

Abstract

Assuring proper safety measures for all the passengers using the trolley, especially in the case of dangerous voltages, should be one of the most important issues to be taken into consideration. The method and the device that detects dangerous voltages that may appear between the body of the trolley and the road surface must be used on all types of trolleys that are supplied from a non-insulated network. The trolleys must be equipped with conducting bands or metallic cables – usually mounted close to the access doors – which collect the road potential. The device is supposed to monitor the potential difference between the body of the trolley and the road and detect two levels of dangerous voltage: the warning level, when the voltage is approximately 20V, and the disconnection level, when the voltage is over 40V, the case in which the main contactor is opened and the supply trolleys are lowered. Keywords: trolley, danger, detection, potential.

Keywords

rolley, danger, detection, potential