단심검지기(LED형 신호등용) 시제품 제작.설치.시험에 관한 보고

putting out lights detector LED Type Signal light Test of a Patented Article Manufacture.Establishment.Examination Report

A lights-out detector, which helps the person in charge of maintenance make a quick judgment in the event of a failure of LED-type traffic lights, was explored/developed and installed/ tested, at Seoul Metro, after they developed a patented pilot product in 2005; and, a product improvement test was conducted to ensure reasonable maintenance of signaling facilities. Having better compatibility with existing circuit in use and displaying stable load current, the device makes the maintenance of lights-out detection and alert easier.