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US 7,583,075 B1Granted
Subtractive current measuring method
AssigneesGeist Manufacturing, Inc., Aphel Limited
InventorHugh G. Hutchison
Life of this patent
Estimating the term…
Abstract
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.
Claims6
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.
5 more elements
Dependencies are inferred from the claim text.