Patent ID: 8373958

Claim:
An receptacle device with power-meter; the receptacle device comprising: a power supply conversion unit configured to convert input power supply so as to measure a current value or a voltage value of the input power supply; an analog-to-digital conversion unit configured to convert an analog output from the power supply conversion unit into a digital signal; a control unit configured to output a control signal to control operation of the receptacle device by comparing the digital signal input from the analog-to-digital conversion unit to a predefined reference value; a switch unit configured to be turned on or off in response to the control signal from the control unit; and a display unit configured to display values of current, voltage, power, zero phase, and power factor of the input power supply, and display a menu that is controllable by a user, wherein the predefined reference value includes an overload reference value and a minimum reference value, and the control unit is further configured to monitor current use of an electrical device connected to the receptacle device, and if the current use is greater than the overload reference value, control the switch unit to cut off power supply, and wherein the control unit is further configured to monitor current use of the electrical device connected to the receptacle device, and if the current use is smaller than the minimum reference value, shut off the switch unit.