Subtractive current measuring method
View Patent ↗The present invention is a subtractive current measuring system for a power receptacle. The system may comprise one or more of the following features: (a) a power receptacle; (b) a current carrying input wire; (c) a current carrying output wire; (d) a current transformer; (e) an electrical measuring device; and (f) interconnecting circuitry linking the current transformer and the electrical measuring device.
1. A method for monitoring current levels in a power receptacle,
the method comprising the steps:
connecting a current carrying input wire, a terminal of a power receptacle and a current carrying output wire in series;
routing the current carrying input wire and the current carrying output wire through a wire-wrapped, toroidal-core current transformer; and
configuring portions of the current carrying input wire and the current carrying output wire disposed within a plane defined by the current transformer such that the current carrying output wire cancels a portion of the electromagnetic field of the current carrying input wire;
passing a current through the current carrying input wire; and
measuring a current generated in the current transformer by the resultant electromagnetic field of the current carrying input wire and the current carrying output wire disposed within the free-space void in the toroidal core.
2. The method of claim 1 ,
further comprising the step:
connecting two or more power receptacles in series via the current carrying input wire and the current carrying output wire.
3. The method of claim 1 , wherein the step of configuring the portions of the current carrying input wire and the current carrying output wire comprises the step:
physically coupling the current carrying input wire and the current carrying output wire.
4. The method of claim 3 , wherein the step of physically coupling the current carrying input wire and the current carrying output wire comprises the step:
intertwining of the current carrying input wire and the current carrying output wire.
5. The method of claim 3 , wherein the step of physically coupling the current carrying input wire and the current carrying output wire comprises the step:
disposing the current carrying input wire and the current carrying output wire within conjoined insulating conduits.
6. The method of claim 1 , wherein the portions of the current carrying input wire and the current carrying output wire disposed within the plane are aligned along an axis perpendicular to the plane.