Mcgraw-edison Company

E Frederick Bestel

Veselin Skendzic

Daniel James Schreiber

Paul Newcomb Stoving

Richard A Harthun

William M Hurst

Dan G Margenian

A method and apparatus for simultaneously measuring voltage and current in a primary high voltage conductor. A current and a voltage from the primary conductor is monitored. The current and voltage information present on the current transformer secondary winding is separated. The voltage information present on the current transformer secondary winding is used to provide a voltage measurement output proportional to the voltage present on the primary conductor. The current information present on the current transformer secondary winding is used to provide a current measurement output proportional to the current flowing on the high voltage conductor.

Current transformer based high voltage measurement apparatus

Active crosstalk cancellation in a multi-phase system is achieved using a capacitive voltage divider for each phase in the multi-phase system. A voltage measurement is obtained for the desired phase and each additional phase of the multi-phase system. A product is generated for each additional phase by multiplying each additional phase voltage measurement by a corresponding predetermined constant. The product for each additional phase is subtracted from the voltage measurement of the desired phase.

Three-phase voltage sensor with active crosstalk cancellation

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West Allis, WI, United States of America

E Frederick Bestel