Patent ID: 6633472
Filing Date: 2003-10-14
Classification: H02H,H02J,Y02B,Y04S

Abstract:
A remote control and power protection circuit comprising:a current detector installed in an electric outlet and adapted to detect current value of inputted power supply at said electric outlet; a CPU (central processing unit), said CPU comprising a current amplifier connected to said current detector and adapted to amplify detected current signal; an integrating circuit connected to said current amplifier and adapted to integrate amplified current signal for comparison with a predetermined safety reference value; an A/D converter converts a current sent by integrating circuit between digital and analog signal; a current judging circuit connected to said integrating circuit and adapted to judge overcurrent status subject to the comparison with the predetermined safety reference value; a trip-off output driver adapted to receive output signal from said current judging circuit and to produce a trip-off control signal subject to the overcurrent status of the output signal from said current judging circuit; a LCD driver adapted to display the current value of the output signal from said current judging circuit; and an overload switch element controlled by said trip-off output driver to switch on/off power supply subject to the current value of the output signal from said current judging circuit; wherein said current detectors detects a signal upon loading of a load at said electric outlet, enabling the detected signal to be amplified by said current amplifier and then sent through said integrating circuit to an A/D converter for conversion into a corresponding digital signal and simultaneously to a comparator for comparison, so that said voltage/current judging circuit judges the comparison result, and drives said LCD driver to display the value of the detected signal and said overload switch element to switch off power supply when the current value of detected signal surpasses the predetermined safety reference value.