Abstract: The present invention relates to a device for the automatic shut-off of equipment's stand-by power which can switch on or off the power for a set of electric and electronic appliances and can reduce the power consumption in a state of waiting for use. The invention provides a device for the automatic shut-off of equipment's stand-by power which particularly comprises a first relay for switching contacts of the first line, a second relay for switching contacts of the second line, and a power switching controller for detecting whether the light is present and for sequently switching the contact states of the first relay and the second relay depending on the result of the light detection to thereby allow or cut off the commercial alternating current through the first and second lines.

Abstract: The present invention relates to a data protective receptacle with the power saving function to accomplish the power saving by getting a sub-receptacle to be automatically controlled so that it may be on or off by a main receptacle. Since this invention can get the power for driving peripheral appliances automatically to be off when the main power for the computer system gets to be off, it can reduce the consumption current thereof while it stands by. Also, this invention gets both alternating-current (AC) power lines to be off when the main system gets to be off, and thereby, it can cut off any leaking current flowing between one power line and the ground line so that the power consumption may be reduced while the system stands by.