ENERGY-SAVING LAMP FOR OUTDOOR LIGHTING Russian patent published in 2012 - IPC F21S8/00 

FIELD: electric engineering.

SUBSTANCE: controlled energy-saving lamp for outdoor lighting includes the first, the second and the third drivers of LEDs, LED unit and thermal relay. The first input of the first driver is connected to output of thermal relay to the input of which the first phase of three-phase network is connected; the first inputs of the second and the third drivers are connected to the second and the third phases of three-phase network respectively; the second inputs of the first, the second and the third drivers are connected to neutral wire of supply mains, and outputs (with equal signs) of all the three drivers are connected to each other and to similar poles of LED unit.

EFFECT: increasing energy saving during the control as part of existing automated outdoor lighting control systems; uniform illumination of roads, streets, parks and building territories when energy-saving and standby modes are switched over; providing stepped three-level switching ON and OFF of LED lamps in the evening and in the morning depending on decrease and increase in natural lighting; improving operating reliability of LED lamps; reducing costs for modernisation of existing lighting systems.

2 dwg