Article

The Josephson-Effect-Based Primary AC Power Standard at the PTB: Progress Report

Phys.-Tech. Bundesanstalt, Braunschweig
IEEE Transactions on Instrumentation and Measurement (impact factor: 1.21). 05/2009; DOI:10.1109/TIM.2008.2008862 pp.1049 - 1053
Source: IEEE Xplore

ABSTRACT This paper reports the incorporation of a Josephson waveform synthesizer (JWS) into the primary standard for AC electrical power at the Physikalisch-Technische Bundesanstalt (PTB). The increase to 10 V of the amplitude delivered by the JWS has allowed matching of the levels of the signals measured to determine the active, reactive, and apparent power-at the 120-V and 5-A level, which is also measured by the device under test. The inherent noise- and drift-free voltages delivered by the JWS allow calibration of the core sampling voltmeter of the PTB primary power standard with an uncertainty of 0.4 muV/V(k = 1) in 100 signal periods and as part of the measuring sequence.

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Keywords

5-A level
 
AC electrical power
 
active
 
apparent power-at
 
core sampling voltmeter
 
drift-free voltages
 
Josephson waveform synthesizer
 
measuring sequence
 
paper reports
 
Physikalisch-Technische Bundesanstalt
 
PTB
 
PTB primary power standard
 
reactive