system of detection of faults on lighting circuits with power series, particularly suitable for airports

摘要

System for failure detection of series fed lighting circuits which monitors the status of series fed lamps, providing for feed through short circuit and protection of the isolating transformer and suppression of overvoltage which appears at the failed lamp terminals. Current monitoring systems become obsolete with the introduction of this invention, which is known as RLW (Runway Lighting Warning). The RLW System, which consists basically of a control unit equipped with detector probes, utilizes the same series fed lamp supply line, without any need for supplementary lines, and displays the failed lamp identification number accurately. The system has its preferred application in series fed airport lighting systems, but may also find application within any series fed lighting system such as that of harbours, road networks and so an.