| 摘要 |
A power control system includes a sensing device, a switch, a controller, a first circuit, and a second circuit. The sensing device determines whether a first predetermined condition or a second predetermined condition has occurred. The controller closes the switch responsive to a signal received from the sensing device indicating the occurrence of the first predetermined condition and opens the switch responsive to a signal received from the sensing device indicating the occurrence of the second predetermined condition. When the switch is open, the first circuit is enabled to apply power to the controller and prevent the application of power to a device. When the switch is closed, the second circuit is enabled to apply power to the controller and permit the application of power to the device.
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