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An improved current-comparator-based power standard with an uncertainty of 2.5 uW/VA (k=1)
; So, Eddy
; Arseneau, Rejean
Measurement Science and Standards; National Research Council Canada
2012 Conference on Precision Electromagnetic Measurements (CPEM), 1-6 July 2012, Washington DC
IEEE Transactions on Instrumentation and Measurement - Special Issue
current-comparator; power bridge; power standard; uncertainty
Electrical Power Measurements; Mesures de puissance électrique
An improved standard derived from a current power bridge for calibrating active/reactive power and energy meters under sinusoidal conditions is described. Measurements can be made at any power factor from zero lag through unity to zero lead, positive or negative power, at 120 V,5 A, and 50 or 60 Hz. The improved power standard has an estimated uncertainty of not more than 2.5 uW/VA at k=1. Special high accuracy current and voltage range extenders have been incorporated to extend the current and voltage ranges up to 200 A and 1200 V, respectively.