| 主权项 |
1. A two-wire load control device configured to be connected in series between an alternating current (AC) power source and a load, comprising:
a main switching unit, which has a main switch element to be connected in series to the AC power source and the load and controls a supply of power to the load; a manipulation switch, which is manipulated by a user and outputs a start-up signal for starting at least the load; a control unit, which is connected to the manipulation switch and controls opening/closing of the main switching unit based on a signal transmitted from the manipulation switch; a first power supply unit electrically powered from both terminals of the main switching unit through a rectifying unit, for supplying a stable voltage to the control unit; a second power supply unit electrically powered from said both terminals of the main switching unit through the rectifying unit, for electrically powering the first power supply unit when no power is supplied to the load; and a third power supply unit for electrically powering the first power supply unit when power is supplied to the load in a closed state of the main switching unit, wherein upon receiving the start-up signal from the manipulation switch, the control unit outputs an initial drive signal for putting the main switch element in a conducting state to the main switching unit before a power source for electrically powering the first power supply unit is switched from the second power supply unit to the third power supply unit. |
