| 摘要 |
A condition control device has been shown as a thermostat that not only controls, but draws power from the same two conductors. The drawing of power from the control conductors is accomplished by momentarily opening the control circuit and allowing a charge to be stored on an energy storage means. The control of the operation of the switching relies on a voltage controlled oscillator that is synchronized to the line frequency during the slight period of time that the solid state load switch means that controls the load is deenergized.
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