Patent ID: 8589095

Claim:
A power measuring device for an electrical circuit that includes a main circuit and multiple parallel branch circuits where the main circuit is electrically connected to the multiple parallel branch circuit, the power measuring device comprising: an induced current meter installed at one of the multiple branch circuit or the main circuit for measuring a first current data of said one of the multiple branch circuit or a second current data of the main circuit, and outputting the first or second current data; a power consumption indicator electrically connected in parallel with said one or another one of the multiple branch circuits for measuring a voltage data of said one or said other one of the multiple branch circuits, communicating with the induced current meter to receive the first or second current data, calculating a first power consumption data based on the first current data and the voltage data or a second power consumption data based on the second current data and the voltage data, and displaying the first or second power consumption data; and whereas the induced current meter and the power consumption indicator are installed separately, and synchronously begin measuring the first current data and the voltage data or synchronously begin measuring the second current data and the voltage data.