Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1992-02-11
1994-08-30
Nguyen, Vinh
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324107, 324117R, G01R 1148
Patent
active
053431430
ABSTRACT:
A current sensing device includes a secondary coil positioned within the curved portion of a U-shaped primary conductor or coil. The secondary coil is surrounded by a non-ferromagnetic metallic shield to prevent capacitive coupling between the windings of the secondary coil and other nearby metallic objects. A nonconductive material is integrally formed about the U-shaped conductor and provides a cavity for receiving the secondary coil an shield in a predetermined position with respect to the U-shaped conductor. A flux guide of ferromagnetic metal, formed in an elliptical-cylindrical shape, surrounds the U-shaped conductor and the secondary coil to provide a flux steering effect to steer flux around the secondary or pick-up coil. The current sensing device is useful in measuring current in electrical utility power monitoring or watthour meter applications.
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Anderson Christopher L.
Slaven Robert E.
Tate Ronald C.
Voisine John T.
Landis & Gyr Metering Inc.
Nguyen Vinh
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