Methods to determine the phase associated with the first and second terminals of current in a location of a system of electric energy and to determine the phase associated with the first, second and third terminals of voltage in a location of a system of electrical power, and,Apparatus for determining the phase associated with the first and second terminals of current in a location of a system of electric energy and to determine the phase associated with the first, second and third terminals of voltage in a location of a system of electric energy

摘要

Methods to determine the phase associated with the first and second terminals of current in a location of a system of electric energy and to determine the phase associated with the first, second and third terminals of voltage in a location of a system of electrical power, and,Apparatus for determining the phase associated with the first and second terminals of current in a location of a system of electric energy and to determine the phase associated with the first, second and third terminals of voltage in a location of a system of electric power.An apparatus and method is described to identify the phase current and voltage and terminal for device of electric system.In one aspect of the present invention, the respective phase current and terminal of two terminals of current is identified based on a known phase and phase angle known associated to a third terminal of current flow in the location of the electricity system.In another aspect of the present invention, phase and the terminal voltage is identified based on a known phase and phase angle known associated to a third terminal location of the current system of electric power.In another aspect of the present invention, its phase and terminal voltage in the location of three terminal voltage is identified based on the known phase and phase angle known to first and second terminals of current flow in the location of the electricity system.