| 摘要 |
PURPOSE: A power save equipment of a streetlight is provided to save the electric power of a streetlight by gradually supplying the voltage-dropped power if an input power for lighting a streetlight at night is in overcurrent or is not under the preset voltage. CONSTITUTION: A power save equipment of a streetlight includes connectors(Con1,Con2) inputting AC(Alternating Current) power through an AC power input terminal and outputting power for lighting a streetlight through an AC power output terminal; a DC(Direct Current) power supply unit(10) which voltage-drops the AC power inputted through the connectors, converts the AC power into DC power, and outputs a relay driving voltage(Vcc_RLY) and a power supply voltage(Vcc); a voltage detecting unit(20) detecting the voltage level of AC power which is input through the connectors; an overcurrent detecting unit(30) which is connected to the input power line of connector and detects the overcurrent of input power; a control unit which outputs the relay driving control signal so as to bypass AC power to the AC power output terminal of connectors during the set time for preheating the initial streetlight by being operated by being the supplied power supply voltage(Vcc) from DC power supply unit, outputs the relay driving control signal so as to gradually select the AC power for lighting the streetlight on sleep mode and the first to third voltages, voltage-dropped, after the preheat of streetlight, and outputs the relay driving control signal so as to gradually select the voltage for lighting the streetlight on sleep mode and the first to third voltages voltage-dropped every time the set time collapses; a reactor(50) which is receives the AC power input through the connectors and then outputs a plurality of voltage-dropped voltages; and a voltage selection unit(60) which selects and outputs one of the voltages, which are outputted by the relay driving control signal of control unit from the reactor, through connectors. [Reference numerals] (50) Reactor |
