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An improved current-comparator-based power standard with an uncertainty of 2.5 uW/VA (k=1)

 
 
Affiliation:
Measurement Science and Standards; National Research Council Canada
Language:
English
Type:
Conference publication
Conference:
2012 Conference on Precision Electromagnetic Measurements (CPEM), 1-6 July 2012, Washington DC
Proceedings
Title:
IEEE Transactions on Instrumentation and Measurement - Special Issue
Date:
2012
Pages :
-
NPArC #:
20917962
Keywords:
current-comparator; power bridge; power standard; uncertainty
Program(s):
Electrical Power Measurements; Mesures de puissance électrique
Abstract:
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.
 
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