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Non-contact current and voltage sensor having detachable housing incorporating multiple ferrite cylinder portions

United States Patent

April 26, 2016
View the Complete Patent at the US Patent & Trademark Office
A detachable current and voltage sensor provides an isolated and convenient device to measure current passing through a conductor such as an AC branch circuit wire, as well as providing an indication of an electrostatic potential on the wire, which can be used to indicate the phase of the voltage on the wire, and optionally a magnitude of the voltage. The device includes a housing formed from two portions that mechanically close around the wire and that contain the current and voltage sensors. The current sensor is a ferrite cylinder formed from at least three portions that form the cylinder when the sensor is closed around the wire with a hall effect sensor disposed in a gap between two of the ferrite portions along the circumference to measure current. A capacitive plate or wire is disposed adjacent to, or within, the ferrite cylinder to provide the indication of the voltage.
Carpenter; Gary D. (Austin, TX), El-Essawy; Wael (Austin, TX), Ferreira; Alexandre Peixoto (Austin, TX), Keller; Thomas Walter (Austin, TX), Rubio; Juan C. (Austin, TX), Schappert; Michael A. (Wappingers Falls, NY)
14/ 319,389
June 30, 2014
This invention was made with government support under DE-EE0002897 awarded by the Department of Energy. The government has certain rights to this invention.